Hi, Apologies for having to ask such a basic question.
We want to be able to give some users preferential access to some nodes. They bought the nodes which are currently in a 'long' partition as their jobs need a longer walltime. When the purchasing users group is not using the nodes I would like other users to be able to run jobs on those nodes but when the owners group submit jobs I want those jobs to be queued as soon as currently running jobs on those nodes are finished. My understanding is that preemption won't work in these circumstances as it will either cancel or suspend currently running jobs, I want the currently running jobs to finish before the preferential ones start. I'm wondering if QOS could do what we need here. Can the following be sanity checked please. Put the specific nodes in both the long and the compute (standard) partition. Then restrict access to the long partition to specified users so that all users can access them in the compute queue but only a subset of users can use the longer wall time queue. $ scontrol update PartitionName=long Users=user1,user2 We currently don't have QOS enabled so change that in slurm.conf and restart the slurmctld. -PriorityWeightQOS=0 +PriorityWeightQOS=1 Then create a qos and modify its priority $ sacctmgr add qos boost $ sacctmgr modify qos boost set priority=10 $ sacctmgr modify user user1 set qos=boost Will that do what I expect please? Many thanks and again apologies for the basic question. Sean -- Sean McGrath M.Sc Systems Administrator Trinity Centre for High Performance and Research Computing Trinity College Dublin sean.mcgr...@tchpc.tcd.ie https://www.tcd.ie/ https://www.tchpc.tcd.ie/ +353 (0) 1 896 3725
